explain syntax

In this line:

function username() {
return !empty($this->data['username']) ? $this->data['username'] : '(no name!)';

What does the question mark and the colon mean or represent?

it's a uniary(sp?) operator. Basically, (using your example)

if(!empty($this->_data['username'])
{
$this->_data['username'];
}

else
{
'(no name!)';
}

but it's easier to read (if used properly). I'm not sure if there's a speed benefit or not.

HTH

ternary operator

Originally posted by kidsleep
it's a uniary(sp?) operator.

sp: Ternary (so called because there are three operands).

And just to correct a small typo:

if(!empty($this->_data['username'])
{
return $this->_data['username'];
}
else
{
return '(no name!)';
}